High Quality Content by WIKIPEDIA articles! Serious Sam is the first game (consisting of two episodes) in the Serious Sam series. It is a first-person shooter (with third-person shooter options) created by the Croatian development house Croteam. Originally released for the PC market only, Serious Sam`s rising popularity resulted in the porting of the series to a number of different platforms, including the Xbox, GameCube, PlayStation 2 and Xbox Live Arcade, among others.